Your Best App?

I'm due to get my HTC Desire in a few days and I was wondering what people think should be my first downloads? I have started to make a list from the excellent reviews on here but anyone have any stand out apps?

Never thought I would be using this app, as much as I do. If your an avid drinker (not an alcoholic, but enjoy your fancy drinks), you should consider it. It's a cool little gadget to have with you at a bar, because I never remember the names of the cocktails ;)

Currently QuickDic as an English-German translator is my best/most useful/most used app since I am in German class every day for 4 hours. It works great though and doesn't kill my battery (the screen is a whole other story.)